Custom flambe.js embed-script for JavaScript target only

flambe.js

/**
 * Custom flambe embed for JavaScript-target only.
 * Author: Mark Knol - http://blog.stroep.nl
 */
var flambe = {};

/**
 * Embed a Flambe game into the page.
 *
 * @return 	True if the game was successfully embedded.
 * 		False if the browser doesn't have a recent enough browser.
 */
flambe.embed = function (urls, elementId) {
	var container = document.getElementById(elementId);
	if (container == null) {
		throw new Error("Could not find element [id=" + elementId + "]");
	}

	var canvas = document.createElement("canvas");
	if ("getContext" in canvas) {
		canvas.id = elementId + "-canvas";
		container.appendChild(canvas);

		// Expose the canvas so Haxe can use it
		flambe.canvas = canvas;

		var script = document.createElement("script");
		script.onload = function () {
			flambe.canvas = null;
		};
		script.src = urls[0];
		container.appendChild(script);
		return true;
	}

	// Nothing was embedded!
	return false;
};

index.html

<!-- embed script looks like this: -->
<script src="flambe.js"></script>
<script>
  flambe.embed(["targets/main-html.js"], "div_main");
</script>